Investigating the reaction mechanism of light tar for Shenfu bituminous coal pyrolysis

Infrared Spectrum and Principal Component Analysis of Heavy Tar Cut by Different Fractions from Tar-Rich Coal

“…As depicted in Figure a–f, the broad absorption peak observed near 3400 cm –1 corresponded to the O–H tensile vibration peak, primarily composed of phenolic OH and hydroxyl groups in alkyl . The range of 3100–3000 cm –1 represented the vibration peak of aromatic compound –CH .…”

“…As depicted in Figure 4a−f, the broad absorption peak observed near 3400 cm −1 corresponded to the O−H tensile vibration peak, primarily composed of phenolic OH and hydroxyl groups in alkyl. 11 The range of 3100−3000 cm −1 represented the vibration peak of aromatic compound −CH. 12 Notably, there was no presence of water molecules −OH between 3700 and 3600 cm −1 , which was because the moisture of raw materials disappears after distillation at different temperatures, and only the organic−OH bond was retained.…”

High-temperature rheological behavior and non-isothermal pyrolysis mechanism of macerals separated from different coals

“…Meanwhile, A is a bridge to construct thermodynamic and kinetic calculations, which will not be interpreted extensively here. 2.479×10 16 7.532×10 13 4.119×10 15 5.823×10 16 1.233×10 18 3.119×10 19 3.876×10 20 3.225×10 21 7.563×10 22 8.823×10 25 4.357×10 33 In particular, although there are fewer previous studies on the kinetics of pyrolysis of coal macerals, we believe it is still necessary to consider the differences between the existing and presently obtained pyrolytic activation energies of raw coals. Table 4 shows the activation energies of pyrolysis obtained by the KAS and FWO methods for coals with volatile contents in the range of 17.38-48.73% in the interval of α=0.1-0.6.…”

“…The specific pyrolysis behavior of coal during the coking process is precious in instructing the transformation of related products such as gas [14], tar [15], and coke [16]. The coking reactions [17] [18], molecular transformations [19], and product behavior during the thermal evolution of coal are further elucidated in the context of current thermal characterization techniques in waste [20],…”